Air conditioner defrosting control method and device thereof

ABSTRACT

An air conditioner defrosting control method and a device thereof. The air conditioner defrosting control method comprises: entering a defrosting mode, and detecting the number of defrosting operations executed in the present defrosting mode; according to the number of defrosting operations and an initially set defrosting time, setting the present set defrosting time recording the present defrosting time; detecting and determining that the present defrosting time reaches the present set defrosting time; updating the number of defrosting operations; and setting the next set defrosting time. By means of the air conditioner defrosting control method and device, the maximum defrosting time can be self-adaptively adjusted without affecting the use of a user, and preventing the accumulation of a frosting layer, and avoiding the risk of pipes bursting.

CROSS-REFERENCES TO RELATED APPLICATIONS

The present disclosure is a national phase application of InternationalApplication No. PCT/CN2018/124385, filed on Dec. 27, 2018, which claimsthe priority of Chinese Application No. 201810425172.1, filed with theChinese Patent Office on May 7, 2018, the entireties of which are hereinincorporated by reference.

FIELD

The present disclosure relates to the field of air conditioner, inparticular, to a defrosting control method for air conditioner and adevice thereof.

BACKGROUND

Multi-split central air conditioner has been widely used in small andmedium-sized buildings and some public buildings. With the diversity ofworking conditions, the individualized needs from the users are becomingmore and more complex, and the requirements for the reliability ofmulti-split central air conditioner are also increasing. During theheating operation in winter, the surface temperature of the outdoor heatexchanger will reach below zero to cause frost, and the frost layer maycause air flow to be blocked, affecting the heating capacity of the airconditioner, so that the user experience is getting worse. In addition,frosting may also lead dangerous hazards such as bursting of the coppertube. At present, the air conditioning system has increased the limit ofthe maximum defrosting time for the outdoor unit. During the operationof defrosting mode, even if the frosting layer is not cleaned, thedefrosting mode will be immediately exited when the maximum defrostingtime is reached. However, in extreme climates, for this method, there isstill a situation in which the frost layer is thicker from the bottom tothe top, resulting in poor heat exchange of the outdoor heat exchangerand incapability of the indoor unit in heating.

SUMMARY

The present disclosure aims to solve at least one of the aboveshortcomings in the prior art.

To this end, the first purpose of the present disclosure is to provide adefrosting control method for an air conditioner, which may adaptivelyadjust the maximum defrosting time, prevent the accumulation of frostlayers, and avoids the risk of squibbing without affecting the usage ofa user.

The second purpose of the present disclosure is to provide a defrostingcontrol device for an air conditioner.

Embodiments of the present disclosure provide a defrosting controlmethod for an air conditioner including:

entering a defrosting mode, and detecting the number of defrostingoperations that have been performed in the defrosting mode;

setting a currently-set defrosting time according to the number ofdefrosting operations and an initially-set defrosting time;

recording a current defrosting time;

detecting and determining that a current defrosting time reaches thecurrently-set defrosting time;

updating the number of defrosting operations; and

setting a next-set defrosting time.

In one embodiment, the setting a next-set defrosting time includes:

setting the next-set defrosting time based on the updated number ofdefrosting operations and the initially-set defrosting time.

In one embodiment, the method further includes:

confirming and exiting the defrosting mode;

detecting and determining that the current defrosting time does notreach the currently-set defrosting time; and

setting the next-set defrosting time as the initially-set defrostingtime.

In one embodiment, subsequent to the detecting and determining that thecurrent defrosting time does not reach the currently-set defrostingtime, the method further includes:

resetting the number of defrosting operations to an initial setting.

In one embodiment, the setting a currently-set defrosting time accordingto the number of defrosting operations and an initially-set defrostingtime includes:

obtaining a pre-set unit extension defrosting duration;

obtaining an extension defrosting time according to the unit extensiondefrosting duration and the number of defrosting operations; and

setting the currently-set defrosting time according to the extensiondefrosting time and the initially-set defrosting time.

In one embodiment, the method further includes:

setting the initially-set defrosting time.

Through the following steps: entering a defrosting mode, and detectingthe number of defrosting operations that have been performed in thedefrosting mode; setting a currently-set defrosting time according tothe number of defrosting operations and an initially-set defrostingtime; recording a current defrosting time; detecting and determiningthat the current defrosting time reaches the currently-set defrostingtime; updating the number of defrosting operations; setting a next-setdefrosting time, the defrosting control method for an air conditioner inthe embodiment of the present disclosure may adaptively adjust themaximum defrosting time, prevent the accumulation of frost layers andavoid the risk of squibbing without affecting the usage of a user.

Embodiments of the present disclosure provide a defrosting controldevice for an air conditioner including a defrosting device, a firstsetting device, a recording device, an updating device and a secondsetting device; and

the defrosting device is configured to detect the number of defrostingoperations that have been performed in the defrosting mode;

the first setting device is configured to set a currently-set defrostingtime according to the number of defrosting operations and aninitially-set defrosting time;

the recording device is configured to record a current defrosting time;

the updating device is configured to detect and determine that a currentdefrosting time reaches the currently-set defrosting time to update thenumber of defrosting operations; and

the second setting device is configured to set a next-set defrostingtime.

In one embodiment, the second setting device is configured to set thenext-set defrosting time based on the updated number of defrostingoperations and the initially-set defrosting time.

In one embodiment, the device further includes an exiting device adetermining device and a third setting device; and,

the exiting device is configured to confirm and exit the defrostingmode;

the determining device is configured to detect and determine that thecurrent defrosting time does not reach the currently-set defrostingtime; and

the third setting device is configured to set the next-set defrostingtime as the initially-set defrosting time.

In one embodiment, the third setting device is configured to reset thenumber of defrosting operations to an initial setting.

In one embodiment, the first setting device is configured to obtain apre-set unit extension defrosting duration, obtain an extensiondefrosting time according to the unit extension defrosting duration andthe number of defrosting operations, and set the currently-setdefrosting time according to the extension defrosting time and theinitially-set defrosting time.

In one embodiment, the device further includes a setting device;

the setting device is configured to set the initially-set defrostingtime.

Through the following steps: entering a defrosting mode, and detectingthe number of defrosting operations that have been performed in thedefrosting mode; setting a currently-set defrosting time according tothe number of defrosting operations and an initially-set defrostingtime; recording a current defrosting time; detecting and determiningthat the current defrosting time reaches the currently-set defrostingtime; updating the number of defrosting operations; setting a next-setdefrosting time, the defrosting control device for an air conditioner inthe embodiment of the present disclosure may adaptively adjust themaximum defrosting time, prevent the accumulation of frost layers andavoid the risk of squibbing without affecting the usage of a user.

Embodiments of the present disclosure provide an air conditionerincluding: a processor; a memory; and a computer program stored in thememory and executable by the processor, and the computer program, whenexecuted by the processor, causes a defrosting control method for airconditioner according to the embodiments to be performed.

Embodiments of the present disclosure provide a computer readablestorage medium having stored therein a computer program that, whenexecuted by a processor, causes a defrosting control method for airconditioner according to the embodiments to be performed.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the present disclosure will become apparent and readilyunderstood with combination of the following drawings, in which:

FIG. 1 is a flow chart of a defrosting control method for airconditioner provided by an embodiment of the present disclosure;

FIG. 2 is a flow chart of a defrosting control method for airconditioner provided by another embodiment of the present disclosure;

FIG. 3 is a structural diagram of a defrosting control device for airconditioner provided by an embodiment of the present disclosure;

FIG. 4 is a structural diagram of a defrosting control device for airconditioner provided by another embodiment of the present disclosure;and

FIG. 5 is a structural diagram of an air conditioner provided by anembodiment of the present disclosure.

DETAILED DESCRIPTION OF THE DISCLOSURE

Below is detailed description of embodiments of the present disclosure,which are shown in the drawings. Throughout the drawings, same orsimilar reference signs identify same or similar elements or elementshaving same or similar functions. The embodiments described below inconjunction with the drawings are illustrative, i.e., the embodimentsare intended to illustrate the present disclosure, but not to limit thepresent disclosure.

The defrosting control method for an air conditioner and a devicethereof according to the embodiment of the present disclosure will bedescribed below with reference to the accompanying drawings.

FIG. 1 is a flow chart of a defrosting control method for airconditioner provided by an embodiment of the present disclosure.

As shown in FIG. 1, the defrosting control method for air conditionerincludes steps of:

S101, entering a defrosting mode, and detecting the number of defrostingoperations that have been performed in the defrosting mode.

In extreme climates, such as in cold winters, the surface temperature ofthe outdoor unit of the air conditioner may reach below zero to causefrost, and the frost layer may cause air flow to be blocked, andaffecting the heating capacity of the air conditioner. To this end, mostair conditioning systems have added a defrosting mode, for example, whenthe temperature of the outside air is lower than a predeterminedtemperature, the system enters the defrosting mode. The defrosting modeusually has a maximum defrosting time, which functions to prevent thenormal use of the user from being affected due to the low temperature ofthe indoor air. During the operation of defrosting mode, even if thefrosting layer is not cleaned, the defrosting mode will be immediatelyexited when the maximum defrosting time is reached. This will make thefrost layer become thicker over time. Therefore, the present disclosureprovides a method capable of adaptively adjusting the maximum defrostingtime to solve the above problem.

In the present embodiment, after the air conditioner enters a defrostingmode, the number of defrosting operations that have been performed inthe defrosting mode is detected, and an initial value of the number ofdefrosting operations may be set in advance, for example, the initialvalue of the number of defrosting operations is set to zero. The airconditioner continues to perform defrosting in the defrosting mode;whenever the defrosting time reaches a set defrosting time of the localdefrosting, the number of defrosting operations is increased by 1, andthe number of defrosting operations that have been performed is detectedbefore the next defrosting.

S102, setting a currently-set defrosting time according to the number ofdefrosting operations and an initially-set defrosting time.

Among them, the initially-set defrosting time is preset, for example,the initially-set defrosting time may be set to 5 minutes.

In a possible implementation of the embodiment of the presentdisclosure, a correspondence between the number of different defrostingoperations and an increased defrosting duration may be preset and storedin the air conditioner, so that after the number of defrostingoperations that have been performed in the current defrosting mode isdetected, the increased defrosting duration corresponding to thedetected number of defrosting operations may be determined by queryingthe pre-stored correspondence, and further a sum of the initially-setdefrosting time and the increased defrosting duration may be calculatedfor setting the value of resulting sum to a currently-set defrostingtime.

In a possible implementation of the embodiment of the presentdisclosure, a unit extension defrosting duration may be preset andstored; when the currently-set defrosting time is set, first the presetunit extension defrosting duration may be obtained, and then anextension defrosting time according to the unit extension defrostingduration and the detected number of defrosting operations is obtained,and further the currently-set defrosting time may be set according tothe extension defrosting time and the initially-set defrosting time.

For example, it is assumed that the preset initially-set defrosting timeis T, an initial value of the number of defrosting operations is 0, andthe unit extension defrosting time is T0. When the air conditionerenters the defrosting mode, first the number (0) of defrostingoperations that have been performed in the current defrosting mode isdetected, and then the set defrosting time for initial defrosting is theinitially-set defrosting time. When the defrosting time for initialdefrosting reaches the initially-set defrosting time, the number ofdefrosting operations is increased by 1 if the condition for exiting thedefrosting mode is not met, and then an extension defrosting time isobtained according to the currently-detected number (1) of defrostingoperations that have been performed and the unit extension defrostingduration T0, i.e., the extension defrosting time is 1*T0; and then, asecondly-set defrosting time is set as T+1*T0 according to the extensiondefrosting time and the initially-set defrosting time, to performdefrosting with T+1*T0 as a maximum defrosting time for the seconddefrosting; if the condition for exiting the defrosting mode is stillnot met when the current defrosting time reaches the set defrosting timeT+1*T0, the number of defrosting operations is further increased by 1,and then, an extension defrosting time is obtained according to thecurrently-detected number (2) of defrosting operations that have beenperformed and the unit extension defrosting duration T0, i.e., theextension defrosting time is 2*T0, and a currently-set (thirdly-set)defrosting time is obtained as T+2*T0, to perform defrosting with T+2*T0as a maximum defrosting time for the third defrosting. The above processis repeated until the defrosting mode is exited when the conditions forexiting the defrosting mode are met. That is, if the maximum defrostingtime is performed for each defrosting in the current defrosting mode,performing for the initially-set defrosting time may not completelyeliminate the frost layer of the air conditioner, so the maximumdefrosting time is extended slightly without affecting the user's use toincrease the defrosting time and prevent the frost layer fromaccumulating.

S103, recording a current defrosting time.

After the set defrosting time for the current defrosting is set, theprocess of current defrosting may be entered and the current defrostingtime is recorded. For example, the defrosting time for the currentdefrosting may be recorded by a timer. Among them, the timer may becontrolled by a controller in the air conditioner, and the controllercontrols the timer to reset to an initial value each time thecurrently-set defrosting time is set, such as controlling the timer toclear.

S104, detecting and determining that a current defrosting time reachesthe currently-set defrosting time.

For example, a time variation of the timer may be detected in real time;when a timing variation of the timer is detected as the currently-setdefrosting time, the current defrosting time is determined to reach thecurrently-set defrosting time.

S105, updating the number of defrosting operations.

When the current defrosting time is determined to reach thecurrently-set defrosting time, the maximum defrosting time is reachedbefore the current defrosting completely eliminates the frost layer,then the number of defrosting operations may be updated, i.e., thenumber of defrosting operations may be added by one.

S106, setting a next-set defrosting time.

In the present embodiment, the next-set defrosting time may be set basedon the updated number of defrosting operations and the initially-setdefrosting time.

In a possible implementation of the embodiment of the presentdisclosure, according to the correspondence between a preset number ofdefrosting operations and an increased defrosting duration, acorresponding increased defrosting duration may be obtained according tothe updated number of defrosting operations, and further the next-setdefrosting time is set according to the increased defrosting durationand the initially-set defrosting time.

In a possible implementation of the embodiment of the presentdisclosure, the next-set defrosting time may be set according to thepreset initially-set defrosting time, the unit extension defrostingduration, and the updated number of defrosting operations.

For example, it is assumed that the initially-set defrosting time is 10minutes, the unit extension defrosting duration is 2 minutes and thedetected number of defrosting operations that have been performed in thecurrent defrosting mode is 3, then the set defrosting time for thecurrent defrosting is 16 minutes. If the defrosting time for the currentdefrosting reaches the set defrosting time of 16 minutes, the number ofdefrosting operations becomes to 4, and then, the set defrosting timefor the next defrosting is calculated as 18 minutes based on thecalculation method in step S102 to set the set defrosting time for thenext defrosting as 18 minutes.

Through the following steps: entering a defrosting mode, and detectingthe number of defrosting operations that have been performed in thedefrosting mode; setting a currently-set defrosting time according tothe number of defrosting operations and an initially-set defrostingtime; recording a current defrosting time; detecting and determiningthat the current defrosting time reaches the currently-set defrostingtime; updating the number of defrosting operations; setting a next-setdefrosting time, the defrosting control method for an air conditioner inthe embodiment of the present disclosure may adaptively adjust themaximum defrosting time, prevent the accumulation of frost layers andavoid the risk of squibbing without affecting the usage of a user.

In another embodiment of the present disclosure, as shown in FIG. 2, thedefrosting control method for air conditioner may further include stepsof:

S107, confirming and exiting the defrosting mode.

As an example, the switching state of the defrosting mode of the airconditioner may be monitored in real time; when it is detected that thedefrosting mode of the air conditioner is changed from the open state tothe closed state, indicating that the frost layer of the air conditionerhas been completely melted, it is confirmed that the defrosting mode isexited.

S108, detecting and determining that a current defrosting time does notreach the currently-set defrosting time.

S109, setting the next-set defrosting time as the initially-setdefrosting time.

S110, resetting the number of defrosting operations to an initialsetting.

When the defrosting mode is exited, a count of the timer at this time isread, and the read data is compared with the currently-set defrostingtime; if read data is less than the currently-set defrosting time, it isdetermined that the current defrosting time does not reach thecurrently-set defrosting time, then the next-set defrosting time is setto the initially-set defrosting time, and the number of defrostingoperations is reset to the initial setting. For example, when the presetnumber of defrosting operations is 0, the number of defrostingoperations is reset to 0.

It should be noted that setting the next-set defrosting time as theinitially-set defrosting time in step 109 refers to that the setdefrosting time for the first defrosting is the initially-set defrostingtime when the defrosting mode is entered again. That is, the setdefrosting time for the first defrosting is the initially-set defrostingtime each time the defrosting mode is entered.

Further, it should be noted that steps 109 and 110 are performed in noparticular order, for example, step 109 may be performed first and thenstep 110 may be performed, or step 110 may be performed first and thenstep 109 may be performed, or steps 109 and 110 may be performedsimultaneously. FIG. 2 only illustrates an example of the execution ofstep 110 after step 109, which should not be considered as a limitation.

For the defrosting control method for air conditioner of the embodimentof the present disclosure, by confirming and exiting the defrostingmode, detecting and determining that a current defrosting time does notreach the currently-set defrosting time, setting the next-set defrostingtime as the initially-set defrosting time, and resetting the number ofdefrosting operations to an initial setting, the initially-setdefrosting time is used as the maximum defrosting time for defrostingeach time the defrosting mode is entered, to avoid the set defrostingtime of the first defrosting to be longer, and realizing the automaticreset of the initially-set defrosting time and the number of defrostingoperations.

Embodiments of the present disclosure further provide a defrostingcontrol device for air conditioner.

As shown in FIG. 3, the defrosting control device for air conditionermay include a defrosting device 310, a first setting device 320, arecording device 330, an updating device 340, and a second settingdevice 350.

The defrosting device 310 is configured to detect the number ofdefrosting operations that have been performed in the defrosting mode.

The first setting device 320 is configured to set a currently-setdefrosting time according to the number of defrosting operations and aninitially-set defrosting time.

In a possible implementation of the embodiment of the presentdisclosure, the first setting device 320 is configured to obtain apre-set unit extension defrosting duration, obtain an extensiondefrosting time according to the unit extension defrosting duration andthe number of defrosting operations, and set the currently-setdefrosting time according to the extension defrosting time and theinitially-set defrosting time.

The recording device 330 is configured to record a current defrostingtime.

The updating device 340 is configured to detect and determine that acurrent defrosting time reaches the currently-set defrosting time toupdate the number of defrosting operations.

The second setting device 350 is configured to set a next-set defrostingtime.

In one embodiment, the second setting device 350 is configured to setthe next-set defrosting time based on the updated number of defrostingoperations and the initially-set defrosting time.

In another embodiment of the present disclosure, as shown in FIG. 4, thedefrosting control device for air conditioner may further include asetting device 360, an exiting device 370, a determining device 380, anda third setting device 390.

The setting device 360 is configured to set the initially-set defrostingtime.

The exiting device 370 is configured to confirm and exit the defrostingmode.

The determining device 380 is configured to detect and determine thatthe current defrosting time does not reach the currently-set defrostingtime.

The third setting device 390 is configured to set the next-setdefrosting time as the initially-set defrosting time.

In another embodiment of the present disclosure, the third settingdevice 390 is further configured to reset the number of defrostingoperations to an initial setting.

It should be noted that the foregoing explanation of the defrostingcontrol method for air conditioner is also applicable to the defrostingcontrol device for air conditioner of the embodiment of the presentdisclosure, and details that are not disclosed in the embodiment of thepresent disclosure are not described herein again.

Through the following steps: entering a defrosting mode, and detectingthe number of defrosting operations that have been performed in thedefrosting mode; setting a currently-set defrosting time according tothe number of defrosting operations and an initially-set defrostingtime; recording a current defrosting time; detecting and determiningthat the current defrosting time reaches the currently-set defrostingtime; updating the number of defrosting operations; setting a next-setdefrosting time, the defrosting control device for an air conditioner inthe embodiment of the present disclosure may adaptively adjust themaximum defrosting time, prevent the accumulation of frost layers andavoid the risk of squibbing without affecting the usage of a user.

Embodiments of the present disclosure further provide an airconditioner.

FIG. 5 is a structural diagram of an air conditioner provided by anembodiment of the present disclosure. As shown in FIG. 5, the airconditioner 50 includes a memory 510, a processor 520 and a computerprogram 530 stored in the memory 510 and executable by the processor520; when the computer program 530 is executed by the processor 520, thedefrosting control method for air conditioner according to the forgoingembodiments of the disclosure is performed.

Embodiments of the present disclosure further provide a computerreadable storage medium having stored therein a computer program that,when executed by a processor, causes a defrosting control method for airconditioner according to the forgoing embodiments of the presentdisclosure to be performed.

In the description of the present specification, the description withreference to the terms “an embodiment”, “some embodiments”, “example”,“specific example”, or “some examples” and the like means that specificfeatures, structures, materials, or features described in connectionwith the embodiments or examples are included in at least one embodimentor example of the present disclosure. In the present specification, theschematic representation of the above terms does not necessarily meanthe same embodiment or example. Furthermore, the particular features,structures, materials, or features described may be combined in asuitable manner in any one or more embodiments or examples.

Besides, the terms “first” and “second” are used only for descriptionand shall not be interpreted as an indication or implication of relativeimportance or an implicit indication of the number of features. Thus,features defined with “first”, “second” may include at least one suchfeature, either explicitly or implicitly. In the description of thepresent disclosure, the meaning of “a plurality” is at least two, suchas two, three, etc., unless specifically defined otherwise.

Any process or method description in the flowcharts or otherwisedescribed herein may be understood to represent a device, segment orportion of code including one or more executable instructions forimplementing the steps of a custom logic function or process, and thescope of the embodiments of the present disclosure includes additionalimplementations in which functions may not be performed in the ordershown or discussed.

The logic and/or steps represented in the flowcharts or otherwisedescribed herein, for example, may be considered as an ordered list ofexecutable instructions for implementing logical functions, and may beembodied in any computer readable medium for use by or in connectionwith an instruction execution system, apparatus, or device (e.g., acomputer-based system, a system including a processor, or other systemthat can fetch instructions from an instruction execution system,apparatus, or device and execute instructions). For the purposes of thisspecification, a “computer-readable medium” can be any apparatus thatcan contain, store, communicate, propagate, or transport a program foruse in an instruction execution system, apparatus, or device, or inconjunction with the instruction execution system, apparatus, or device.More specific examples (non-exhaustive list) of computer readable mediainclude electrical connection (electronic device) having one or morewirings, portable computer disk cartridge (magnetic device), randomaccess memory (RAM), read only memory (ROM), erasable and editableread-only memory (EPROM or flash memory), fiber optic devices, andportable compact disk read-only memory (CDROM). Additionally, since aprogram can be obtained electronically, for example by optical scanningof paper or other medium, followed by editing, interpretation or, ifnecessary, processing in other suitable manner, and then storing it incomputer memory, the computer readable medium can even be a paper orother suitable medium on which the program can be printed.

It should be understood that portions of the present disclosure may beimplemented in hardware, software, firmware or a combination thereof. Inthe above-described embodiments, multiple steps or methods may beimplemented in software or firmware stored in a memory and executed by asuitable instruction execution system. In one embodiment, if implementedin hardware and in another embodiment, it can be implemented by any ofthe following techniques or combinations thereof well known in the art:discrete logic circuit with logic gates for implementing logic functionson data signals, ASIC with appropriate combinational logic gate,Programmable Gate Array (PGA), Field Programmable Gate Array (FPGA),etc.

In addition, the functional units in the embodiments of the presentdisclosure can be integrated in one processing device or each unit mayindependently physically exist, or two or more units may be integratedinto one device. The integrated devices can be implemented in the formof hardware, and can also be implemented in the form of a softwarefunctional device. If the integrated devices are implemented in the formof a software functional device and sold or used as an independentproduct, they can be stored in a computer-readable storage medium.

1. A defrosting control method for air conditioner, comprising: enteringa defrosting mode, and detecting a number of defrosting operations thathave been performed in the defrosting mode; setting a currently-setdefrosting time according to the number of defrosting operations and aninitially-set defrosting time; recording a current defrosting time;detecting and determining that a current defrosting time reaches thecurrently-set defrosting time; updating the number of defrostingoperations; and setting a next-set defrosting time.
 2. The methodaccording to claim 1, wherein the setting a next-set defrosting timecomprises: setting the next-set defrosting time based on an updatednumber of defrosting operations and the initially-set defrosting time.3. The method according to claim 1, further comprising: confirming andexiting the defrosting mode; detecting and determining that the currentdefrosting time does not reach the currently-set defrosting time; andsetting the next-set defrosting time as the initially-set defrostingtime.
 4. The method according to claim 3, after detecting anddetermining that the current defrosting time does not reach thecurrently-set defrosting time, further comprising: resetting the numberof defrosting operations to an initial setting.
 5. The method accordingto claim 1, wherein the setting a currently-set defrosting timeaccording to the number of defrosting operations and an initially-setdefrosting time comprises: obtaining a pre-set unit extension defrostingduration; obtaining an extension defrosting time according to an unitextension defrosting duration and the number of defrosting operations;and setting the currently-set defrosting time according to the extensiondefrosting time and the initially-set defrosting time.
 6. The methodaccording to claim 1, further comprising: setting the initially-setdefrosting time.
 7. A defrosting control device for air conditioner,comprising: a defrosting device, configured to detect a number ofdefrosting operations that have been performed in a defrosting mode; afirst setting device, configured to set a currently-set defrosting timeaccording to the number of defrosting operations and an initially-setdefrosting time; a recording device, configured to record a currentdefrosting time; an updating device, configured to detect and determinethat a current defrosting time reaches the currently-set defrosting timeto update the number of defrosting operations; and a second settingdevice, configured to set a next-set defrosting time.
 8. The defrostingcontrol device for air conditioner according to claim 7, wherein, thesecond setting device is configured to set the next-set defrosting timebased on an updated number of defrosting operations and theinitially-set defrosting time.
 9. The defrosting control device for airconditioner according to claim 7, further comprising: an exiting device,configured to confirm and exit the defrosting mode; a determiningdevice, configured to detect and determine that the current defrostingtime does not reach the currently-set defrosting time; and a thirdsetting device, configured to set the next-set defrosting time as theinitially-set defrosting time.
 10. The defrosting control device for airconditioner according to claim 9, wherein, the third setting device isconfigured to reset the number of defrosting operations to an initialsetting.
 11. The defrosting control device for air conditioner accordingto claim 7, wherein a first setting device is configured to obtain apre-set unit extension defrosting duration, obtain an extensiondefrosting time according to a unit extension defrosting duration andthe number of defrosting operations, and set the currently-setdefrosting time according to the extension defrosting time and theinitially-set defrosting time.
 12. The defrosting control device for airconditioner according to claim 7, further comprising: a setting device,configured to set the initially-set defrosting time.
 13. An airconditioner, comprising: a processor; a memory; and a computer programstored in the memory and executable by the processor, wherein thecomputer program, when executed by the processor, causes a defrostingcontrol method for air conditioner according to claim 1 to be performed.14. A computer readable storage medium having stored therein a computerprogram that, when executed by a processor, causes a defrosting controlmethod for air conditioner according to claim 1 to be performed.